The post was a picture of balloons with a note that read "Happy Birthday to the twins! Love, Granddad."

He also included the captions #beyonce, #jayz and #happybirthday.

The post, which was also shared on Instagram, has been re-tweeted more than 7 thousand times. However it was not enough to convince some members of the Beyhive, who refuse to believe the baby news until they hear it from Bey herself. Others weren't happy that Knowles was sharing the news before Beyonce.